She was introduced by gay members of Congress, including Rep. Sean Patrick Maloney of New York, who in his introduction declared, "Sarah, it's about time" a transgender person spoke at the DNC.

McBride told her story about coming out as transgender while serving as student body president of American University.

Meeting new heroes left and right. I mean mostly left but anyway... Congrats again #SarahMcBride!!! #demconventionpic.twitter.com/4m1AnxqY4k

Still, McBride said that there is still work to do for transgender Americans to be accepted. She urged Americans to vote for Hillary Clinton, who she said understands that "everyone has the freedom to live openly and equally."

McBride said her belief that Clinton needs to be elected grew stronger after the death of her husband, who died of cancer at the age of 28 just four days after they were married.

"Knowing Andy left me profoundly changed," McBride said of her late husband. "But more than anything else, his passing told me that every day matters when it comes to living your life to the fullest."